Type-writing machine.



G. G. GOING.

TYPE WRITING MACHINE.

APPLICATION FILED MAY25, I817.

1,29,731, Patented Dec. 31,1918.

l/E/V TOR 5% 63 1 ATTORNEY earner rare.

GEORGE a. some, or MIDDLETOWN, CONNECTICUT, ASSIGNOR TO THE NOISELESS TYPEWRITER COMBANY, or MIDDLETOWN, CONNECTICUT, .A CORPORATION or commqrrcu'r.

. To all whom it may-concern:

Be it known that I, GEORGE GoULD GOING, a citizen of the United States, residing at Middletown, in the county of Middlesex and State of Conn, have invented certain new and useful Improvements 'in Type- Writing .Machines, of which the following is a'full, clear and exact description, such as will enable others skilled in the art to which it appertains to make and use the same.

This invention relates to typewriting machines, and more particularly to improved" type actions thereof.

type carrier One of the objects of the invention is to 'provide simple and practical means, applicable to various styles of typewriters, for materially reducing the noise of impact of a when impelled to effect printmg. I

A further object is to provide devices,

comprising few parts and capable of cheap manufacture, for limiting the printing strokes of the type carriers substantially independently of the platen.

The subject-mattershown and claimed in the present application includes features disclosed and claimed more broadly in the I present 'applicants co-pending*'application filed April 6, 1916, Serial No. 89,262 and al lowed lldarch 26,1918. The present im: provement is directed more particularly to the means for preventing overthrow of a type bar restraining toggle, as hereinafter set forth, while the earlier filed application .is directed more broadly to the combination in which the type bars. arerestrained in their movement toward the platen bymeans inde-' .pendent of the connection between the key levers and type bars and through which movement of thelatter toward the platen is initiated. l

Other objects and advantages will be in part noted hereinafter in connection with the following descriptionof the accompanying drawing, which illustrates a typical em: cdiment of the invention, and in which Figure 1 is a side view of certain of the typewriter parts, and showing one type ac- 'tion and Fig. '2 is a similar view, showing the parts in printing position. v I

In the structure illustrated, the typewriter frame includes a base 1, upright standards 2 and a top late 3. A platen roll 4, arranged on a sulta le camage, is positioned above the frame and arranged, by any of the suitable well-known constructions, for letter-- spacing travel and vertical case-shifting. The other common accessory features of the machine, such as ribbon, feeding mechanism, carriage release, etc., are, of course, present.

The type actions comprise a bank of key levers 5 pivoted at the rear of the machine and each connected by a train of levers to actuate type carriers 6' pivoted on a supporting segment 7. Each key lever 5 is .nor-- mally urged upward toFig. 1 position by a coil spring 8 and thereby, through the medium of a cam slot 9 and roller 10 fixed in the lower end of a rocking lever 11, allows said lever to assume vertical position aided by a .return spring 12. A short link 13 is pivoted to the upper end of lever 11 and to 1 the pivoted type. bar 6 adjacent the, axis of a the latter.

The construction described is such that, on depression of the key lever, the cam edge of the slot 9 forces the lever 11 to swing clockwise and thereby swing the type carrier against the platen to effect printing. By proper design of the cam slot the action may insure acceleration of the type bar in its movement to combine the desirable features of easy touch and quick action.

For the purposes of this invention there is also provided a connection between the type'bar and a stationary part of'the machine operative to control the printing limit when the type bar is swung to impression.

As shown, apair of pivotally connectedlinks 14.- and-15 are respectively pivoted to the type bar adjacent the type head, and to an adjustable bolt 16' rigidly mounted on plate 17, in turn fixed to the type bar restsegment 18. The links mentioned, it will be noted, are not included in the power transmitting connection between the type bar and the key lever, but act in the manner of a toggle when;

the key lever is depressed to assume extended position, and thereby positively limit the forward swing of the type bar without impact between relatively moving parts. Fur-. thermore due tothe convenient and accurate capa ility of adjustment of the bolt 16,

the toggle links may be readily positioned .to, in operation, stop the type bar at a point after the printing is efiected but before the expenditure of its momentum by abrupt impact against the platen backing. The link 15 is also providedwith an extended port on l9'having an overturned or odset extremity 20 disposed toeng'ag'e the link 1 when \the toggle isextended. The portion 19 preferably possesses slight resiliency, so that as the toggle links swing to extension, overthrow of the latter is prevented and at the same time slight spring is imparted to the portion 19, whereby an immediate breakage, of the toggle joint is insured and initial return imof the complete extension of the toggle links.

pulse imparted to the type bar. For the lat- .ter function it will be noted that the ofl'set extremity 20 of the extension 19 would be disposed in a plane such that its engagement by the link 14; is efiected'slightly in advance while operating efl'ectively to limit the throw- 1 of the type bars.

As many changes could be made in the above construction and many apparently widely difi'erent embodiments of this invention could be made without departing from the scope thereof, it is intended that all matter contained in the above description or shown in the accompanying drawing shall 1 tion, which be said to tall therebetween.

Patent is:

'be interpreted as illustrative and not in alimitingv sense.

"It is also to guage used in the, following claims is ,intended to cover all of the generic and specific features on theiinvention herein described and all statements of the scope of the invenas a matter of language, might Having described my invention, what I claim as new and, desire to secure by Letters 1. In a typewriting'machine, in. combination, a platen; a type bar pivotally mounted therebelow, normally disposed in recumbent substantially horizontal position and free to swing through substantially 90 degrees to efl-ect printing; operating means, including a key lever, to swing said type bar; and

toggle links pivoted to said type bar and to a stationary part of the'machine and acting be understood that the Ian- 7 when extended to determine the printing stroke of' said type bar; said links when w folded being disposed below and substantially'parallel with said type bar, and when extended being disposed at substantially a 45 degree angle thereto. p i

2. In a typewriting machine, in combination, a platen, a pivoted type bar, a key lever, an operative connection between said movement to the former from the latter to effect printing, toggle links pivoted to,said type bar and stationary part of the machine andacting, when extended, to limit the printing stroke of said type bar substantially independently of said platen, and

' type bar and said key lever for imparting 1 means carried by said links to prevent overthrow thereof.

3. In a typewriting machine, in combination, a platen, a pivoted type bar, a key-lever, an operative connection between said type bar and said key lever for imparting movement to the former from the latter to elfect printing, toggle links pivoted to said type bar and a stationary part of the machine and acting, when extended, to limit the printing'stroke of said type bar substantially independently of said platen, and

means carried by said links to prevent overthrow thereofand to-impart initial return movement to said type bar.

J 4. Ida typewritmg machine, in combination, a type action including a pivoted type bar, means comprising a pair of pivotally connected links'with extremities pivoted to said type bar adjacent its ,free end and to a stationary part of the machine for limiting the printing stroke of said type bar, and an element carried by one of said links and positioned for engagement with the other when said links approach extended position. 5. In a typewriting machine, i-n combination, a platen, a type action including a pivoted type bar, a link pivoted to said type bar adjacent. its free end, a link pivoted to a stationary part of the machine, said links being pivoted together as a toggle, and a resilient extension on one of said links having a portion for engagement with the other link when said, links are extended to prevent .overthrow'thereof and to effect breakage of the togglejoint.

In testimony whereof I aflix my slgnature;

G. GOING. 

